Means for controlling the supply of liquid fuel in internal-combustion engines.



` l E. w. HEUER.y f MEANS v|70",CONTNOLLING THE SUPPLY 0F |.|QU|D FUEL IN INTERNAL COMBUSTION ENGINES.

'Arnqcnrlon mio Mmm. 191;. 1,249,478, Y Patnbd D60. 11, 1917.

3 SHEETS-SHEET l.

` .1-2'. w. PETIER, MEANS FOR CONTROLLING THE SUPPLY 0F LIQUID4 FUEL IN INTERNAL COMBUSTION ENGINES.

4APPucATlon msn 11,111.21. lsu.

Patented 1190.111917.

s SHEETS-shin z fE. w. PETTER.

FLY 0F LIQUID FUEL IN INTERNAL COMBUSTION ENGINES. APrLlcATlon FILED mn. 21. 1911.

1,249,478. L Patented Dec.V 11, 1917.

3 SHEETS-SHEET 3.

MEANS FORCONTROLLING THE SUP UNITED STATES Q TENT OFFICE. I

ERNEST WILLOUGHBY PETTER, 0F. YEOVIL, ENGLAND.

MEANS FOR,CONTROLLING THE SUPPLY OF LIQUID FUEL IN INTERNAL-COMBUSTION ENGINES.

Specification of Letters Patent. Pntcntd Dec. 11, 1917.

Application led March 21, 1917. Serial No. 156.484.

To all whom 'it may concern Be it knovvn that I, EnNns'r VVlLLoUonnY IE'rrnn, a subject of the King of Great Britain and Ireland, of Nautilus W orks, Yeovil, in the county of Somerset, England, have invented certain new and useful Improveme'nts in Means for Controlling the Supply of .Liquid Fuel in Internal-Combustion Fn- 'nes, of which the following is a specication.

This invention relates to variable delivery fuel pumps for internal combustion engines and provides means for adjusting the moment of injection of the fuel when the enine is Working or at rest so as l'o make the 'injection of the fuel earlier or later as ref quired to suit the working conditions of the engine.

Apparatus made in accordance with this invention comprises a rotating shaft, a fuel feeding pump, transmission mechanism for operating said pump from said shaft com prising two eccentrics carried on said shaft one mounted upon the other, said eccentrics being relatively shiftable to move the een ter of the outer eccentric from its position of maximum throw to a position substantially coinciding with the center of the shaft, and by means for shifting the inner eccentric in relation to the shaft when the engine is working or at rest for the purpose glfl adjusting the moment of injection of the Figure 1 is a perspective View showing hand operated means for altering the moment when the fuel is injected.

Fig. 2 is anelevation looking in the dircction of the arrow in Fig. 3 with eccentric strap removedfshowing centrifugal means for altering the throw of the pump;

Fig. 3 is a. section; y

Fig. 4 is an elevation looking in the direction of the arrow Fig. 5, and

Fig. 5 is a. section showing the means of adjusting the position of the inner eccentric in relation to the casin and shaft. l

Upon the shaft a is tted a carrier com- -prismg a pulley b having a sleeve c, the

carrier being provided with slots d d. 0n the sleeve c is disposed a casing e adapted to be adjusted angularly Von the carrier by the pins' 20 and 21 referred to later which pass. through the slots ci d. UponA the caslng e is formed an eccentric g which bears on the shaft a.- 0n this eccentric is disweights at g. Upon the eccentric It is disposed the strap r to which the necting rod s is attached.

ln or lcr to alter the moment when the Vfuel 'is injected the inner eccentric g has to be moved in relation to the carrier b c which is keyed to the shaft a. For this purpose a flange 2 provided with -slots 3 and l is keyed to the shaft a, and a flange 5 is adapted to be sli on the shaft a by means of feathers G an 7 working in corres ond'- ing keyways in the said shaft. The eathers G and 7 are connected toa .late 8 and are adapted to be moved emllivise4 by a. screwed shaft 9 Working in a fixed nut 10,

pump con- 'the plate 8' being free to move on the shaft 9 between two collars 11 and 12 fixed to the shaft 9. 13 is a handwheel on the end ,of the screwed shaft '9. On the flange are` mounted two coarse-threaded screws 14 and 15 which are free to rotate in bearings in the said flangia 2. These screws 14 and 15 engage two t. lreaded holes in the flange 5. Upon the stems of the screws 14 and 15 are mounted cranks 16 and 17 which are tonnected by links 18 and 19 to pins 20 and 21 mounted on casing e. The pins 2O and 21 pass through the slots 3 and 4. on the flan e 2. Ufernatively the flange 5 can be made to slide by mea-ns of a yoke ring and fork mounted on the circumference of the flange according to the well known manner employed in governors, friction clutches, and similar mechanisms.

ln operation as the speed increases, the

` weights/c 7c fly out and -pull the eccen 'o h around thev eccentric on theshaft awhere by the eccciifiicity is reduced, and consequently the throw of the pump and the amount of fuel supplied to the combustion chamber'. When it is desired t0 alter the moment when the fuel is injected, the casin;r e and with it the inner eccentricv g is moved in relation to the carrier b c by means of the handle 13 through the feathers 6' and 7 flange 5, screws 14 and 15, cranks 16 and 17, links 18 and 19, and pins 20 and 21 connected to the casing Thi? .eccentric mechanism shown particulso larly in Figs. 3 and 4 hereof is claimed in my application Serial No. 95,032, filed May `2, 1916.

What I claim and desire to secure by Let- 5 ters Patent is 1. In a variable delivery fuel pump for internal combustion engines, in combination, a rotating shaft, a fuel feeding pump, transmission mechanism for operating said pump from said shaft comprising two eceentrics i carried on said shaft, one mounted upon the other, said eccentrics being relatively shiftable to move the center of the outer eccentric (in an approximately radial line toward the center of the shaft) from its positionA of maximum throw toV a position substantially coinciding with governor controlled by the speed of said shaft for shifting said eccentrics relatively so as to vary the operation of said pump in feeding said fuel, and means for moving the said inner eccentric angularly'on the shaft for adjusting the moment of injection of lthe fuel when the engine is in motion.

2. In a variable delivery u'el pump for internal combustion engines, in combination, a rotating shaft, a fuell feeding pump, transmission mechanism for operating said pump the center of the shaft, a.

from said shaft comprising two eccentrica carried on said shaft, one mounted upon the other, said eccentries being relatively shiftable to move the center of the outer eccentric (in an approximatel radial line toward the center of the shaft from its position of maximum throw to a position substantially coinciding with the center ofthe shaft, a governor controlled by the speed-,of said shaft for shifting said eccentrics relatively so as to vary the operation of said pump in feeding said fuel, a member on said rotatin shaft which is adapted to be rotated with said shaft and to be slid thereon, means for sliding said member when the shaft is either rotating for utilizing said slidmg motion to move the said inner eccentric angularly on the shaft to advance or retard the time of the stroke of the fuel injection pump.

In witness whereof I have hereunto signed my name in the presence of two subscribing witnesses.

ERNEST WILLUGHBY PETTER.

Witnesses: l

REGINALD EATON ELLIS, ROBERT MILTON SPEARPOINT.

or at rest, 'and means. 

